Epson DFX-9000 Field Repair Guide
3/29/07
Motors, Sensors, and Switches
Printer Component,
Software Item,
LCD Display,
Printer Button
Page 159.
Sensors and Switches
There are 22 sensors and switches utilized in the DFX-9000.
Sensor Name (acronym)
Function
Automatic Paper Thickness Control
Home Position Sensor
(APTC HP)
Detects that the
Carrier Unit
reaches the furthest position by checking the
phase of the
SS Gear
Automatic Paper Thickness Control
Sensor (APTC)
Detects the thickness of the paper
Carrier Encoder Sensor (CES)
Determines the position of the
Carrier Unit
, with reference to the print start
position and the motor speed. The resolution of the
CES Scale
is 1/120
inch.
Cover Open Switch
Detects whether or not the
Top Cover
is open. Printing is stopped when the
Top Cover
is open.
Fan1 Rotation Sensor
Detects whether or not the fan blades are rotating.
Fan2 Rotation Sensor
Detects whether or not the fan blades are rotating.
Fan3 Rotation Sensor
Detects whether or not the fan blades are rotating.
Fan4 Rotation Sensor
Detects whether or not the fan blades are rotating.
Front Paper Empty Sensor (FPES)
Detects the presence or absence of paper in the Front Tractor Assembly
Interlock Switch
Removes the drive voltage from the
SP Motor
when the Top Cover is open.
Left Edge Sensor (LES)
Corrects the deceleration-start position after measuring the gap between
the actual and predetermined stop positions. If the gap is bigger than the
allowable correction value, the
SP Motor
is determined to be out of step,
resulting in a fatal error.